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path: root/drivers/media/usb/dvb-usb/dvb-usb-remote.c
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Diffstat (limited to 'drivers/media/usb/dvb-usb/dvb-usb-remote.c')
-rw-r--r--drivers/media/usb/dvb-usb/dvb-usb-remote.c397
1 files changed, 397 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/dvb-usb-remote.c b/drivers/media/usb/dvb-usb/dvb-usb-remote.c
new file mode 100644
index 0000000000..65e2c9e2cd
--- /dev/null
+++ b/drivers/media/usb/dvb-usb/dvb-usb-remote.c
@@ -0,0 +1,397 @@
+// SPDX-License-Identifier: GPL-2.0
+/* dvb-usb-remote.c is part of the DVB USB library.
+ *
+ * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
+ * see dvb-usb-init.c for copyright information.
+ *
+ * This file contains functions for initializing the input-device and for handling remote-control-queries.
+ */
+#include "dvb-usb-common.h"
+#include <linux/usb/input.h>
+
+static unsigned int
+legacy_dvb_usb_get_keymap_index(const struct input_keymap_entry *ke,
+ struct rc_map_table *keymap,
+ unsigned int keymap_size)
+{
+ unsigned int index;
+ unsigned int scancode;
+
+ if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
+ index = ke->index;
+ } else {
+ if (input_scancode_to_scalar(ke, &scancode))
+ return keymap_size;
+
+ /* See if we can match the raw key code. */
+ for (index = 0; index < keymap_size; index++)
+ if (keymap[index].scancode == scancode)
+ break;
+
+ /* See if there is an unused hole in the map */
+ if (index >= keymap_size) {
+ for (index = 0; index < keymap_size; index++) {
+ if (keymap[index].keycode == KEY_RESERVED ||
+ keymap[index].keycode == KEY_UNKNOWN) {
+ break;
+ }
+ }
+ }
+ }
+
+ return index;
+}
+
+static int legacy_dvb_usb_getkeycode(struct input_dev *dev,
+ struct input_keymap_entry *ke)
+{
+ struct dvb_usb_device *d = input_get_drvdata(dev);
+ struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table;
+ unsigned int keymap_size = d->props.rc.legacy.rc_map_size;
+ unsigned int index;
+
+ index = legacy_dvb_usb_get_keymap_index(ke, keymap, keymap_size);
+ if (index >= keymap_size)
+ return -EINVAL;
+
+ ke->keycode = keymap[index].keycode;
+ if (ke->keycode == KEY_UNKNOWN)
+ ke->keycode = KEY_RESERVED;
+ ke->len = sizeof(keymap[index].scancode);
+ memcpy(&ke->scancode, &keymap[index].scancode, ke->len);
+ ke->index = index;
+
+ return 0;
+}
+
+static int legacy_dvb_usb_setkeycode(struct input_dev *dev,
+ const struct input_keymap_entry *ke,
+ unsigned int *old_keycode)
+{
+ struct dvb_usb_device *d = input_get_drvdata(dev);
+ struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table;
+ unsigned int keymap_size = d->props.rc.legacy.rc_map_size;
+ unsigned int index;
+
+ index = legacy_dvb_usb_get_keymap_index(ke, keymap, keymap_size);
+ /*
+ * FIXME: Currently, it is not possible to increase the size of
+ * scancode table. For it to happen, one possibility
+ * would be to allocate a table with key_map_size + 1,
+ * copying data, appending the new key on it, and freeing
+ * the old one - or maybe just allocating some spare space
+ */
+ if (index >= keymap_size)
+ return -EINVAL;
+
+ *old_keycode = keymap[index].keycode;
+ keymap->keycode = ke->keycode;
+ __set_bit(ke->keycode, dev->keybit);
+
+ if (*old_keycode != KEY_RESERVED) {
+ __clear_bit(*old_keycode, dev->keybit);
+ for (index = 0; index < keymap_size; index++) {
+ if (keymap[index].keycode == *old_keycode) {
+ __set_bit(*old_keycode, dev->keybit);
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/* Remote-control poll function - called every dib->rc_query_interval ms to see
+ * whether the remote control has received anything.
+ *
+ * TODO: Fix the repeat rate of the input device.
+ */
+static void legacy_dvb_usb_read_remote_control(struct work_struct *work)
+{
+ struct dvb_usb_device *d =
+ container_of(work, struct dvb_usb_device, rc_query_work.work);
+ u32 event;
+ int state;
+
+ /* TODO: need a lock here. We can simply skip checking for the remote control
+ if we're busy. */
+
+ /* when the parameter has been set to 1 via sysfs while the driver was running */
+ if (dvb_usb_disable_rc_polling)
+ return;
+
+ if (d->props.rc.legacy.rc_query(d,&event,&state)) {
+ err("error while querying for an remote control event.");
+ goto schedule;
+ }
+
+
+ switch (state) {
+ case REMOTE_NO_KEY_PRESSED:
+ break;
+ case REMOTE_KEY_PRESSED:
+ deb_rc("key pressed\n");
+ d->last_event = event;
+ input_event(d->input_dev, EV_KEY, event, 1);
+ input_sync(d->input_dev);
+ input_event(d->input_dev, EV_KEY, d->last_event, 0);
+ input_sync(d->input_dev);
+ break;
+ case REMOTE_KEY_REPEAT:
+ deb_rc("key repeated\n");
+ input_event(d->input_dev, EV_KEY, event, 1);
+ input_sync(d->input_dev);
+ input_event(d->input_dev, EV_KEY, d->last_event, 0);
+ input_sync(d->input_dev);
+ break;
+ default:
+ break;
+ }
+
+/* improved repeat handling ???
+ switch (state) {
+ case REMOTE_NO_KEY_PRESSED:
+ deb_rc("NO KEY PRESSED\n");
+ if (d->last_state != REMOTE_NO_KEY_PRESSED) {
+ deb_rc("releasing event %d\n",d->last_event);
+ input_event(d->rc_input_dev, EV_KEY, d->last_event, 0);
+ input_sync(d->rc_input_dev);
+ }
+ d->last_state = REMOTE_NO_KEY_PRESSED;
+ d->last_event = 0;
+ break;
+ case REMOTE_KEY_PRESSED:
+ deb_rc("KEY PRESSED\n");
+ deb_rc("pressing event %d\n",event);
+
+ input_event(d->rc_input_dev, EV_KEY, event, 1);
+ input_sync(d->rc_input_dev);
+
+ d->last_event = event;
+ d->last_state = REMOTE_KEY_PRESSED;
+ break;
+ case REMOTE_KEY_REPEAT:
+ deb_rc("KEY_REPEAT\n");
+ if (d->last_state != REMOTE_NO_KEY_PRESSED) {
+ deb_rc("repeating event %d\n",d->last_event);
+ input_event(d->rc_input_dev, EV_KEY, d->last_event, 2);
+ input_sync(d->rc_input_dev);
+ d->last_state = REMOTE_KEY_REPEAT;
+ }
+ default:
+ break;
+ }
+*/
+
+schedule:
+ schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc.legacy.rc_interval));
+}
+
+static int legacy_dvb_usb_remote_init(struct dvb_usb_device *d)
+{
+ int i, err, rc_interval;
+ struct input_dev *input_dev;
+
+ input_dev = input_allocate_device();
+ if (!input_dev)
+ return -ENOMEM;
+
+ input_dev->evbit[0] = BIT_MASK(EV_KEY);
+ input_dev->name = "IR-receiver inside an USB DVB receiver";
+ input_dev->phys = d->rc_phys;
+ usb_to_input_id(d->udev, &input_dev->id);
+ input_dev->dev.parent = &d->udev->dev;
+ d->input_dev = input_dev;
+ d->rc_dev = NULL;
+
+ input_dev->getkeycode = legacy_dvb_usb_getkeycode;
+ input_dev->setkeycode = legacy_dvb_usb_setkeycode;
+
+ /* set the bits for the keys */
+ deb_rc("key map size: %d\n", d->props.rc.legacy.rc_map_size);
+ for (i = 0; i < d->props.rc.legacy.rc_map_size; i++) {
+ deb_rc("setting bit for event %d item %d\n",
+ d->props.rc.legacy.rc_map_table[i].keycode, i);
+ set_bit(d->props.rc.legacy.rc_map_table[i].keycode, input_dev->keybit);
+ }
+
+ /* setting these two values to non-zero, we have to manage key repeats */
+ input_dev->rep[REP_PERIOD] = d->props.rc.legacy.rc_interval;
+ input_dev->rep[REP_DELAY] = d->props.rc.legacy.rc_interval + 150;
+
+ input_set_drvdata(input_dev, d);
+
+ err = input_register_device(input_dev);
+ if (err)
+ input_free_device(input_dev);
+
+ rc_interval = d->props.rc.legacy.rc_interval;
+
+ INIT_DELAYED_WORK(&d->rc_query_work, legacy_dvb_usb_read_remote_control);
+
+ info("schedule remote query interval to %d msecs.", rc_interval);
+ schedule_delayed_work(&d->rc_query_work,
+ msecs_to_jiffies(rc_interval));
+
+ d->state |= DVB_USB_STATE_REMOTE;
+
+ return err;
+}
+
+/* Remote-control poll function - called every dib->rc_query_interval ms to see
+ * whether the remote control has received anything.
+ *
+ * TODO: Fix the repeat rate of the input device.
+ */
+static void dvb_usb_read_remote_control(struct work_struct *work)
+{
+ struct dvb_usb_device *d =
+ container_of(work, struct dvb_usb_device, rc_query_work.work);
+ int err;
+
+ /* TODO: need a lock here. We can simply skip checking for the remote control
+ if we're busy. */
+
+ /* when the parameter has been set to 1 via sysfs while the
+ * driver was running, or when bulk mode is enabled after IR init
+ */
+ if (dvb_usb_disable_rc_polling || d->props.rc.core.bulk_mode)
+ return;
+
+ err = d->props.rc.core.rc_query(d);
+ if (err)
+ err("error %d while querying for an remote control event.", err);
+
+ schedule_delayed_work(&d->rc_query_work,
+ msecs_to_jiffies(d->props.rc.core.rc_interval));
+}
+
+static int rc_core_dvb_usb_remote_init(struct dvb_usb_device *d)
+{
+ int err, rc_interval;
+ struct rc_dev *dev;
+
+ dev = rc_allocate_device(d->props.rc.core.driver_type);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->driver_name = d->props.rc.core.module_name;
+ dev->map_name = d->props.rc.core.rc_codes;
+ dev->change_protocol = d->props.rc.core.change_protocol;
+ dev->allowed_protocols = d->props.rc.core.allowed_protos;
+ usb_to_input_id(d->udev, &dev->input_id);
+ dev->device_name = d->desc->name;
+ dev->input_phys = d->rc_phys;
+ dev->dev.parent = &d->udev->dev;
+ dev->priv = d;
+ dev->scancode_mask = d->props.rc.core.scancode_mask;
+
+ err = rc_register_device(dev);
+ if (err < 0) {
+ rc_free_device(dev);
+ return err;
+ }
+
+ d->input_dev = NULL;
+ d->rc_dev = dev;
+
+ if (!d->props.rc.core.rc_query || d->props.rc.core.bulk_mode)
+ return 0;
+
+ /* Polling mode - initialize a work queue for handling it */
+ INIT_DELAYED_WORK(&d->rc_query_work, dvb_usb_read_remote_control);
+
+ rc_interval = d->props.rc.core.rc_interval;
+
+ info("schedule remote query interval to %d msecs.", rc_interval);
+ schedule_delayed_work(&d->rc_query_work,
+ msecs_to_jiffies(rc_interval));
+
+ return 0;
+}
+
+int dvb_usb_remote_init(struct dvb_usb_device *d)
+{
+ int err;
+
+ if (dvb_usb_disable_rc_polling)
+ return 0;
+
+ if (d->props.rc.legacy.rc_map_table && d->props.rc.legacy.rc_query)
+ d->props.rc.mode = DVB_RC_LEGACY;
+ else if (d->props.rc.core.rc_codes)
+ d->props.rc.mode = DVB_RC_CORE;
+ else
+ return 0;
+
+ usb_make_path(d->udev, d->rc_phys, sizeof(d->rc_phys));
+ strlcat(d->rc_phys, "/ir0", sizeof(d->rc_phys));
+
+ /* Start the remote-control polling. */
+ if (d->props.rc.legacy.rc_interval < 40)
+ d->props.rc.legacy.rc_interval = 100; /* default */
+
+ if (d->props.rc.mode == DVB_RC_LEGACY)
+ err = legacy_dvb_usb_remote_init(d);
+ else
+ err = rc_core_dvb_usb_remote_init(d);
+ if (err)
+ return err;
+
+ d->state |= DVB_USB_STATE_REMOTE;
+
+ return 0;
+}
+
+int dvb_usb_remote_exit(struct dvb_usb_device *d)
+{
+ if (d->state & DVB_USB_STATE_REMOTE) {
+ cancel_delayed_work_sync(&d->rc_query_work);
+ if (d->props.rc.mode == DVB_RC_LEGACY)
+ input_unregister_device(d->input_dev);
+ else
+ rc_unregister_device(d->rc_dev);
+ }
+ d->state &= ~DVB_USB_STATE_REMOTE;
+ return 0;
+}
+
+#define DVB_USB_RC_NEC_EMPTY 0x00
+#define DVB_USB_RC_NEC_KEY_PRESSED 0x01
+#define DVB_USB_RC_NEC_KEY_REPEATED 0x02
+int dvb_usb_nec_rc_key_to_event(struct dvb_usb_device *d,
+ u8 keybuf[5], u32 *event, int *state)
+{
+ int i;
+ struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table;
+ *event = 0;
+ *state = REMOTE_NO_KEY_PRESSED;
+ switch (keybuf[0]) {
+ case DVB_USB_RC_NEC_EMPTY:
+ break;
+ case DVB_USB_RC_NEC_KEY_PRESSED:
+ if ((u8) ~keybuf[1] != keybuf[2] ||
+ (u8) ~keybuf[3] != keybuf[4]) {
+ deb_err("remote control checksum failed.\n");
+ break;
+ }
+ /* See if we can match the raw key code. */
+ for (i = 0; i < d->props.rc.legacy.rc_map_size; i++)
+ if (rc5_custom(&keymap[i]) == keybuf[1] &&
+ rc5_data(&keymap[i]) == keybuf[3]) {
+ *event = keymap[i].keycode;
+ *state = REMOTE_KEY_PRESSED;
+ return 0;
+ }
+ deb_err("key mapping failed - no appropriate key found in keymapping\n");
+ break;
+ case DVB_USB_RC_NEC_KEY_REPEATED:
+ *state = REMOTE_KEY_REPEAT;
+ break;
+ default:
+ deb_err("unknown type of remote status: %d\n",keybuf[0]);
+ break;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(dvb_usb_nec_rc_key_to_event);